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Summary: The BBC reports about Li-Fi, which delivers data much faster using visible light.

Credits: Produced for air Nov. 30, 2015, but can run a few days later.

Notes: The BBC reports about a new method of delivering data that s being successfully tested, using the visible spectrum rather than invisible radio waves. So-called li-fi can deliver internet access 100 times faster than current wi-fi, with up to 1 Gbps. A standard LED bulb, an internet connection, and a photo detector are used by the Estonian start-up company Velmenni. The company s laboratory tests have proven theoretical speeds of 224Gbps. The company s chief executive Deepak Solanki predicts consumers will be using li-fi within three to four years. Professor Harald Haas from Edinburgh University first demonstrated the technology at a TED conference in 2011, showing how it does not interfere with other radio signals, and uses a part of the radio spectrum, the visible waves, that s 10,000 times larger then where radio waves currently travel. Sunlight is li-fi s kryptonite, and it does not travel through walls, so this is an end-of-the-line technology for large office buildings.

Version 1: Li-Fi, using visible spectrum, may replace Wi-Fi for Nov. 30, 2015